Cookies are small files which are stored on a user's computer. They are designed to hold an amount of data specific to a particular client and website, and can be accessed either by the web server or the client computer. This allows the server to deliver a page tailored to a particular user, or the page itself can contain some script which is aware of the data in the cookie and so is able to carry information from one visit to the website (or related site) to the next.
Cookies do not in themselves present a threat to privacy, since they can only be used to store information that the user has volunteered or that the web server already has.
_session_id, unique token, Sessional
Allows Shopify to store information about your session (referrer, landing page, etc)
_shopify_visit, no data held, Persistent for 30 minutes from the last visit
Used by our website provider’s internal stats tracker to record the number of visits
_shopify_uniq, no data held, Expires midnight (relative to the visitor) of the next day
Counts the number of visits to a store by a single customer
cart, unique token, persistent for 2 weeks
Stores information about the contents of your cart
_secure_session_id, unique token, sessional storefront_digest, unique token, indefinite if the shop has a password
This is used to determine if the current visitor has access